Mike Tyson, 3 Royal Bengal Tigers - $4,000 a month

As well as being a lover of pigeons, he also once owned three Royal Bengal tigers; two girls named Kenya and Storm and a male tiger named Boris.

You might even recognise one of them from a starring role in hit film, The Hangover in 2009.

The tigers cost him $4000 a month just on their upkeep and sadly, when it turned out Tyson didn’t have a proper license for owning the tigers, they were sent to a refugee in Colorado to live out their days away from the Hollywood spotlight.

Leonardo DiCaprio, Tortoise - $400

Leonardo DiCaprio bought a Sulcata tortoise for $400 (Image: Getty)

Although Leonardo DiCaprio’s tortoise only set him back a cool $400 (a mere drop in the ocean for Hollywood heavyweights), the animals are known to live as long as 100 years - so it’s more of an investment in time than one of money.